CODEWITHSUNDEEP
javascript
Bodzio
Bodzio

Reputation: 2520

Geting number between two values

Is there an easy way to get number between two values or these values? for example:

min: 10, max: 100
(in -> out)

   1 -> 10
   5 -> 10
  10 -> 10
  50 -> 50
 100 -> 100
1000 -> 100
9999 -> 100

now I'm using this:

Math.max(10, Math.min(100, value));

but is there a more efficient and/or elegant way to do this?

Upvotes: 0

Views: 141

Answers (3)

Rahul Tripathi
Rahul Tripathi

Reputation: 172448

James is right. Check this for detail

/**
 * Returns a number whose value is limited to the given range.
 *
 * Example: limit the output of this computation to between 0 and 255
 * (x * 255).clamp(0, 255)
 *
 * @param {Number} min The lower boundary of the output range
 * @param {Number} max The upper boundary of the output range
 * @returns A number in the range [min, max]
 * @type Number
 */
Number.prototype.clamp = function(min, max) {
  return Math.min(Math.max(this, min), max);
};

Upvotes: 0

p.s.w.g
p.s.w.g

Reputation: 149020

No, there's really no better way than that. It's probably what I'd go with. If you really want an alternative, you could use the conditional operator like this:

value > 100 ? 100 : value < 10 ? 10 : value;

However, I find this is a lot harder to read than a simple min / max.

Of course, if you find yourself doing this a lot, you can make your own function for brevity:

function clamp(val, min, max) {
    return Math.max(min, Math.min(max, val));
}

Then just use it like this:

clamp(value, 10, 100);

Upvotes: 0

SimpleJ
SimpleJ

Reputation: 14768

This is probably overkill, but here's a reusable solution:

function clamper(min, max) {
    return function(v) {
        return v > max ? max : (v < min ? min : v);
    };
}

var clamp = clamper(0, 100);

console.log(clamp(25));
console.log(clamp(50));
console.log(clamp(74));
console.log(clamp(120));
console.log(clamp(-300));

Fiddle: http://jsfiddle.net/mx3whct6/

Upvotes: 1

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